[FLINK-11144][tests] Make tests runnable on Java 9

This enables to run tests on Java 9. However, not all tests are passing at
the moment.

This closes #7293.

pom.xml

@@ -765,6 +765,33 @@ under the License.
 					</dependency>
 				</dependencies>
 			</dependencyManagement>
+
+			<build>
+				<pluginManagement>
+					<plugins>
+						<plugin>
+							<groupId>org.apache.maven.plugins</groupId>
+							<artifactId>maven-shade-plugin</artifactId>
+							<version>3.1.1</version>
+						</plugin>
+					</plugins>
+				</pluginManagement>
+
+				<plugins>
+					<plugin>
+						<groupId>org.apache.maven.plugins</groupId>
+						<artifactId>maven-compiler-plugin</artifactId>
+						<configuration>
+							<source>1.9</source>
+							<target>1.9</target>
+							<compilerArgs combine.children="append">
+								<arg>--add-exports=java.base/sun.net.util=ALL-UNNAMED</arg>
+								<arg>--add-exports=java.management/sun.management=ALL-UNNAMED</arg>
+							</compilerArgs>
+						</configuration>
+					</plugin>
+				</plugins>
+			</build>
 		</profile>
 
 		<profile>
@@ -1346,31 +1373,15 @@ under the License.
 				<artifactId>maven-checkstyle-plugin</artifactId>
 			</plugin>
 			<plugin>
-				<!-- just define the Java version to be used for compiling and plugins -->
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-compiler-plugin</artifactId>
-				<version>3.1</version><!--$NO-MVN-MAN-VER$-->
-				<configuration>
-					<source>${java.version}</source>
-					<target>${java.version}</target>
-					<!-- The semantics of this option are reversed, see MCOMPILER-209. -->
-					<useIncrementalCompilation>false</useIncrementalCompilation>
-					<compilerArgs>
-						<!-- The output of Xlint is not shown by default, but we activate it for the QA bot
-						to be able to get more warnings -->
-						<arg>-Xlint:all</arg>
-						<!-- Prevents recompilation due to missing package-info.class, see MCOMPILER-205 -->
-						<arg>-Xpkginfo:always</arg>
-					</compilerArgs>
-				</configuration>
 			</plugin>
 
 			<!--surefire for unit tests and integration tests-->
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-surefire-plugin</artifactId>
-				<!-- Do NOT use a version >=2.19.X, as test cases may get stuck before execution. See SUREFIRE-1255 -->
-				<version>2.18.1</version>
+				<version>2.22.1</version>
 				<configuration>
 					<forkCount>${flink.forkCount}</forkCount>
 					<reuseForks>${flink.reuseForks}</reuseForks>
@@ -1547,10 +1558,23 @@ under the License.
 			</plugin>
 		</plugins>
 
-		<!-- Plugin configurations for plugins activated in sub-projects -->
-
 		<pluginManagement>
 			<plugins>
+				<plugin>
+					<groupId>org.apache.maven.plugins</groupId>
+					<artifactId>maven-compiler-plugin</artifactId>
+					<version>3.8.0</version>
+					<configuration>
+						<source>${java.version}</source>
+						<target>${java.version}</target>
+						<!-- The semantics of this option are reversed, see MCOMPILER-209. -->
+						<useIncrementalCompilation>false</useIncrementalCompilation>
+						<compilerArgs>
+							<!-- Prevents recompilation due to missing package-info.class, see MCOMPILER-205 -->
+							<arg>-Xpkginfo:always</arg>
+						</compilerArgs>
+					</configuration>
+				</plugin>
 
 				<plugin>
 					<groupId>org.apache.maven.plugins</groupId>